Formation of CuSbS2 and CuSbSe2 thin films via chalcogenisation of Sb-Cu metal precursors

Diego Colombara, Laurence M Peter, K D Rogers, J D Painter, S Roncallo

Research output: Contribution to journalArticle

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Abstract

Due to the availability and low cost of the elements, the ternary Cu-Sb-S and Cu-Sb-Se semiconductor systems are being studied as sustainable alternative absorber materials to replace CuIn(Ga)(S,Se)2 in thin film photovoltaic applications. Simple evaporation of the metal precursors followed by annealing in a chalcogen environment has been employed in order to test the feasibility of converting stacked metallic layers into the desired compounds. Other samples have been produced from aqueous solutions by electrochemical methods that may be suitable for scale-up. It was found that the minimum temperature required for the complete conversion of the precursors into the ternary chalcogen is 350 C, while binary phase separation occurs at lower temperatures. The new materials have been characterised by structural, electrical and photoelectrochemical techniques in order to establish their potential as absorber layer materials for photovoltaic applications. The photoactive films consisting of CuSbS2 and CuSbSe2 exhibit band-gap energies of ~ 1.5 eV and ~ 1.2 eV respectively, fulfilling the Shockley-Queisser requirements for the efficient harvesting of the solar spectrum.
LanguageEnglish
Pages7438-7443
Number of pages6
JournalThin Solid Films
Volume519
Issue number21
DOIs
StatusPublished - 31 Aug 2011

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Chalcogens
Metals
absorbers (materials)
Thin films
solar spectra
thin films
metals
availability
absorbers
evaporation
aqueous solutions
costs
Phase separation
requirements
annealing
Evaporation
Energy gap
Availability
Annealing
Semiconductor materials

Keywords

  • semiconductor
  • chalcostibite
  • CuSbS2
  • heterojunction
  • photovoltaics
  • CuSbSe2
  • band-gap
  • alloy electrodeposition

Cite this

Formation of CuSbS2 and CuSbSe2 thin films via chalcogenisation of Sb-Cu metal precursors. / Colombara, Diego; Peter, Laurence M; Rogers, K D; Painter, J D; Roncallo, S.

In: Thin Solid Films, Vol. 519, No. 21, 31.08.2011, p. 7438-7443.

Research output: Contribution to journalArticle

Colombara, D, Peter, LM, Rogers, KD, Painter, JD & Roncallo, S 2011, 'Formation of CuSbS2 and CuSbSe2 thin films via chalcogenisation of Sb-Cu metal precursors' Thin Solid Films, vol. 519, no. 21, pp. 7438-7443. DOI: 10.1016/j.tsf.2011.01.140
Colombara D, Peter LM, Rogers KD, Painter JD, Roncallo S. Formation of CuSbS2 and CuSbSe2 thin films via chalcogenisation of Sb-Cu metal precursors. Thin Solid Films. 2011 Aug 31;519(21):7438-7443. Available from, DOI: 10.1016/j.tsf.2011.01.140
Colombara, Diego ; Peter, Laurence M ; Rogers, K D ; Painter, J D ; Roncallo, S. / Formation of CuSbS2 and CuSbSe2 thin films via chalcogenisation of Sb-Cu metal precursors. In: Thin Solid Films. 2011 ; Vol. 519, No. 21. pp. 7438-7443
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